Zobrazeno 1 - 10
of 13 015
pro vyhledávání: '"P. Browning"'
Autor:
Moshtaghpour, Amirafshar, Velazco-Torrejon, Abner, Robinson, Alex W., Browning, Nigel D., Kirkland, Angus I.
The extended Ptychographical Iterative Engine (ePIE) is a widely used phase retrieval algorithm for Electron Ptychography from 4-dimensional (4-D) Scanning Transmission Electron Microscopy (4-D STEM) measurements acquired with a focused or defocused
Externí odkaz:
http://arxiv.org/abs/2411.14915
Autor:
Browning, Tim, Chan, Stephanie
The large sieve is used to estimate the density of integral quadratic polynomials $Q$, such that there exists an odd degree integral polynomial which has resultant $\pm 1$ with $Q$. The proof uses properties of cyclotomic polynomials and the Chebotar
Externí odkaz:
http://arxiv.org/abs/2411.09264
Autor:
Browning, Alexander P, Hamis, Sara
Many biological systems regulate phenotypic heterogeneity as a fitness-maximising strategy in uncertain and dynamic environments. Analysis of such strategies is typically confined both to a discrete set of environmental conditions, and to a discrete
Externí odkaz:
http://arxiv.org/abs/2411.03166
Publikováno v:
Phys. Plasmas 31 (2024) 102903
Quasi-periodic pulsations (QPPs) are often observed in flare emissions. While these may reveal much about the time-dependent reconnection involved in flare energy release, the underlying mechanisms are still poorly understood. In this paper, we use 2
Externí odkaz:
http://arxiv.org/abs/2410.14563
We study solutions to the equation $a+b=c$, where $a,b,c$ form a triple of coprime natural numbers. The $abc$ conjecture asserts that, for any $\epsilon>0$, such triples satisfy $\mathrm{rad}(abc) \ge c^{1-\epsilon}$ with finitely many exceptions. In
Externí odkaz:
http://arxiv.org/abs/2410.12234
A key initial step in mechanistic modelling of dynamical systems using first-order ordinary differential equations is to conduct a global structural identifiability analysis. This entails deducing which parameter combinations can be estimated from ce
Externí odkaz:
http://arxiv.org/abs/2410.03757
Autor:
Schiavo, Luiz A. C. A., Gordovskyy, Mykola, Browning, Philippa K., Silva, Suzana S. A., Verth, Gary, Ballai, Istvan, Shelyag, Sergiy, Ruzheinikov, Sergey N., McLaughlin, James A., Fedun, Viktor
Publikováno v:
ApJ 975 (2024) 45
Solar pores are ideal magnetic structures for wave propagation and transport of energy radially-outwards across the upper layers of the solar atmosphere. We aim to model the excitation and propagation of magnetohydrodynamic waves in a pore with a lig
Externí odkaz:
http://arxiv.org/abs/2409.15106
We prove upper and lower bounds on the number of pairs of commuting $n\times n$ matrices with integer entries in $[-T,T]$, as $T\to \infty$. Our work uses Fourier analysis and leads us to an analysis of exponential sums involving matrices over finite
Externí odkaz:
http://arxiv.org/abs/2409.01920
Monitoring of conflict risk in the humanitarian sector is largely based on simple historic averages. To advance our understanding, we propose Hawkes processes, a self-exciting stochastic process used to describe phenomena whereby past events increase
Externí odkaz:
http://arxiv.org/abs/2408.14940
Autor:
Browning, Tim, Verzobio, Matteo
We extend work of Heath-Brown and Salberger, based on the determinant method, to provide a uniform upper bound for the number of integral points of bounded height on an affine surface, which are subject to a polynomial congruence condition. This is a
Externí odkaz:
http://arxiv.org/abs/2408.11453